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Latest News on PFOA and PFOS

  • PFOA and PFOS are manmade chemicals that have been used in a variety of industrial and commercial products since the 1940s:
    • stain and water repellents on clothing and furniture
    • paper products
    • fire-fighting foams
    • non-stick cookware and coatings
    • food packaging
  • PFOA and PFOS have been found in soil, air and groundwater sites throughout the U.S. and the world. These chemicals are persistent in the environment and do not break down through normal environmental processes.

  • The EPA has established health advisories for PFOA and PFOS based on the assessment of the latest peer-reviewed science. The US EPA requested that all large public water agencies sample their water for PFOA and PFOS to help determine where if they are present and at what levels.

  • The EPA originally established the provisional health advisory level for PFOA and PFOS at 400 parts per trillion (ppt) and 200 ppt, respectively. On May 19, 2016, the EPA announced that they were lowering the provisional health advisory level for PFOA and PFOS to a combined limit of 70 ppt.
  • Results of April 9, 2016 laboratory testing of all of the City of Corona’s water sources detected PFOA and PFOS in various sources; of select locations the amounts detected were above that of the new provisional health advisory value.
  • The City of Corona discontinued use of all affected source waters that are not treated at our reverse osmosis facility on May 16, 2016, and will not resume use until appropriate treatment is installed. The City is utilizing alternative sources that do not contain PFOA or PFOS.
  • Water in the City meets all state and federal health standards and remains safe to drink.
  • Corona will continue to take any and all steps necessary to protect public health.

For more information on PFOA and PFOS, including potential health concerns, visit the US EPA’s website at

For more information on Corona’s water quality please contact the Water Quality Division at 951-736-2322 or email